#include <stdio.h>
#include <string.h>

typedef struct Books
{
    char title[50];
    char author[50];
    char subject[100];
    int book_id;
} Book;

int main()
{
    Book book;

    strcpy( book.title, "C 教程");
    strcpy( book.author, "Runoob");
    strcpy( book.subject, "编程语言");
    book.book_id = 12345;

    printf( "书标题 : %s\n", book.title);
    printf( "书作者 : %s\n", book.author);
    printf( "书类目 : %s\n", book.subject);
    printf( "书 ID : %d\n", book.book_id);

    return 0;
}